The style is closer to "Wings of Love" than to anything I normally write.
Anyway, it features mostly FE12-only characters-- Ryan, Melissa, Luke, Rody, and Cecil, plus the Grust twins (and Marth and Norne). I say "FE12" rather than "FE3/12" because once the Shin Monshou characterizations got out of the can, it's hard to go back and recall how I thought Luke and Cecil and the rest were supposed to be written. Yes, the characters went from being stick figures to full-color caricatures, but they didn't really gain any depth by it, IMO. I condone the direction that IS went with Melissa (mostly), and I can't complain over what I've seen of Rody and Ryan, but Sir Luke the Awesome and Aggro Chick!Cecil seem to both be over-the-top, objectionable in the same sense that I object to a lot of the Tellius gang. Writing them feels pretty easy. Writing them feels pretty darned cheap. They feel very... familiar... in a sense that can't just be laid down to "FE Archetype Syndrome."
The full adaptation, if we ever get the darned thing, may change my mind, but I didn't have to read ALL of Kieran's supports to know I have a visceral distaste for his shtick. And the end result is, writing straight up "FE12" stories often lands me in this very weird zone where I can't take anything 100% seriously. I can't discount the darkness and teh drama, but there's always something a little absurd about it all. See: "Now Sleeps the Crimson Petal" and the aforementioned "Wings of Love."